There are two nice tools in the web that could reformat your webpage and show them gracefully, without all the ads and the annoying structure of many web pages.
Readability -
http://lab.arc90.com/experiments/readability/
TidyRead -
http://www.tidyread.com
Both sites ask you to add them to your bookmark bar, and then, when clicking on their bookmark - show the site in a beautiful way. I tried that on many sites such as NY Times, Guardian, Financial Times and more.
Could we integrate calibre with those websites? (Running their script whenever a feed is downloaded)